Revolving door speed control



Feb 1934- T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed Se t. 10,1952 4 Sheets-Sheet l INVEN TOR. Wage M5005.

A TTORNEY 6, 1934- T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL 4Sheets-Sheet 2 Filed Sept. 10, 1932 INVENTOR taq em wo Q I JIZMZOQ 91??v 411% 6, 9% ATTORNEY Feb, 6, 1934.

T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed Sept. 10, 1932 4Sheets-Sheet 3 INVENTOR afilga/vxwofi,

ATTORNEY 1934- T. M. HAGENBOOK REVOLVING DOOR SPEED CONTROL Filed Sept.10, 1952 4 Sheets-Sheet 4 A TTORNEY "'HI HIIIIIWIIII INVENTOR.

52 8%M1f06 9T6, Wag Moo Patented Feb. 6, 1934 STATES QFFICE toInternational Steel Company,

Evansville,

Ind, a corporation of Indiana Application September 10, 1932 Serial No.632,627

Claims.

My invention relates broadly to revolving doors and more particularly toa speed control for attachment for revolving doors.

One of the objects of my invention is to provide a construction of speedcontrol device for attachment to revolving doors of various types forcontrolling the speed of revolution of the revolving door and increasingthe safety of operation.

Another object of my invention is to provide a simplified constructionof speed control for revolving doors which may be inexpensivelymanufactured on a quantity production basis and utilized for precisionoperation in the control of revolving doors of various makes.

Still another object of my invention is to provide a construction ofspeed control hardware for revolving doors having means for engaging ordisengaging the rotary structure of 29 the revolving door and governingthe speed of the revolving door when in engaged position.

A further object of my invention is to provide a construction ofcentrifugal governor for revolving doors wherein substantial load isadded to the door under conditions where the rate of speed at which thedoor is operated increases beyond a predetermined value.

A still further object of my invention is to provide an attachmentcapable of engaging the upper pintle of the revolving door and establisha geared connection with a centrifugal governor and friction brakedevice for controlling the speed of operation of the revolving doorwithin predetermined limits.

Another object of my invention is to provide a construction ofcentrifugally operated clutch for a governor for revolving doors havingmeans for rendering a friction brake effective when the speed ofrotation of the revolving door tends to exceed a predetermined rate.

Other and further objects of my invention reside in the construction offriction brake revolving door speed control as set forth more fully inthe specification hereinafter following by reference to the accompanyingdrawings, in which:

Figure 1 is a cross-sectional view taken through the revolving doorspeed control of my invention with some of the parts illustrated in sideelevation; Fig. 2 is a side elevational view of the revolving door speedcontrol showing the supporting rails constituting the trolleys and thesocket bearing for the upper portion of the revolving door illustratedin cross-section and looking in the direction of arrow A of Fig. 1;

Fig. 3 is a horizontal sectional View of the re- (Cl. 201S) volving doorspeed control device of my inven tion taken on line 33 of Fig. 1; Fig. 4is a horizontal sectional view taken through the speed control on line44 of Fig. l on an enlarged scale; Fig. 5 is a cross-sectional view 30taken through the speed control on line 55 of Fig. 1; Fig. 6 is across-sectional view taken through the speed control on line 66 ofFig.1; Fig. 7 is a side elevation of the ratchet mechanism employed inconnection with the centrifugal governor mechanism in the revolving doorspeed control device of my invention; and Fig. 8 is a schematic Viewshowing the manner in which the revolving door is assembled forconnection with the speed control device. 3'

Referring particularly to the drawings, reference character 1 designatesthe wings of the revolving doors arranged to revolve around the centralaxis 2 immediately below the rails 3 constituting the trolley supportfor the revolving doors. The wings 1 of the revolving doors aresuspended from the rails 3 by means of roller members 4 journaled on theends of shaft 5 connected through support 6 with member .7 whichengages, the upper rail 8 of the revolving doors. The upper rail 8 isprovided with socket member 9 within which annular member 10 is seatedfor housing the annular members 11 and 12 having ball races for guidingball bearings 14 therebetween. The annular member 10 8 has upwardlyprojecting cylindrical walls 10a and 101) between which, the annularmembers 11 and 12 are confined and. into which the annular member 16projects and rests upon the upper portion of the annular ring member 12.The mem- 30 her 16 is screw threaded at 16a to receive the screwthreaded end of the tubular member 2 as shown. The upper portion ofmembers 16 is provided with a socket 161) into which there extends thecylindrical liner 1'7. The cylindrical liner 1'7 provides a socket whichis adapted to receive the spring pressed pin 18. The spring pressed pin18 is chamfered at 18a, to permit ready insertion or removal of pin 18from the socket formed interiorly of the liner 17. The pin 18 is mountedwithin a cylindrical guide 19 which projects from the lower plate 20forming part of the housing of the speed control device. The cylindricalguide 19 has a screw device 21 extending through one side thereof with apin 22 from the end of the screw device projecting into a socket 23 inone side of the projectible pin 18 so that pin 18 is free to movevertically against the resistance offered by coil spring 30. It will beobserved that the upper portion of annular member 16 has a beveledsurface represented at 160 which enables the revolving door assembly tobe interconnected with the speed control governor mechanism by rollingthe revolving doors on the trollies to a position where the beveledsurface contacts with the chamfered edge 18a of pin 18, thereby raisingpin 18 and allowing the pin to drop into the socket formed by the liner17. The revolving door structure is thus centered with respect to thegovernor mechanism, and the gear teeth 1651 on the periphery of theannular member 16 are brought into mesh with the gear teeth on gear 32.Gear 32 is carried by stub shaft 33 which is journaled in ball bearings34 and 35. Ball bearings 34 are mounted in races supported in plate 20.Ball bearings 35 are mounted in races supported in casting 36 whichextends in a position substantially chordal to the casing within whichthe speed control mechanism is housed. The casting 36 which isillustrated more clearly in Figs. 2 and 5, is secured to plate 20 bymeans of screws 36a and is provided with downwardly depending lugs 37through which set screws 33 pass and engage rails 3 forming part of thestationary equipment of the revolving door. In order to further mountthe governor rigidly with respect to the stationary frame structurebeneath which the revolving door moves, I provide the casting 39 beneaththe governor housing and substantially chordal to the governor housingand connected thereto through screw members 39a. The casting 39 hasdepending lugs 40 through which the securing screws 41 pass, whichscrews grip rails 3 as represented in Fig. 6 thereby insuring a rigidmounting for the governor housing immediately above the rails 3.

The transversely extending plate 20 has the cover member 31 securedthereto by means of bolt members 42. The cover member 31 and platemember 20 is recessed as indicated at 31c and 20a to receive rollerbearing guide rings repsented at 43 and 44 respectively. A stub shaft 45is journaled vertically through casing 31 and plate 20 by means ofannular members 46 and 4'7 aligned with respect to the annular members43 and 44 by means of conical shaped roller bearings 48 and 49 as shown.Shaft 45 is provided with gear teeth 50 on the lower projecting endthereof adapted to' mesh with gear 51 carried by stub shaft 33. It willbe seen that rotation of the revolving doors 1 serves to impart rotarymovement to member 16 whereby gear 16d drives gear 32 there- "byrotating shaft 33 in the bearings 34 and 35 and driving gear 51 which inturn drives vertical shaft 45 through gear teeth 50 thereon. Shaft 45has a sleeve 52 secured thereon concentrically within the frame 53 ofthe friction discs. The shaft 45 is diametrically apertured for thepassage of pin 54. The aperture 55 in shaft 45 through which pin 54extends is elongated vertically so that the frame 53 in the frictionwheel is free to move. vertically within limits offered by the aperture55. A coil spring 56 is disposed within the central socket of shaft 45and exerts a continuous force against pin 54 and the adjusting screwhead 57. By adjusting screw head 5? downwardly against coil spring 56the vertical thrust of the frame 53 of the friction wheel is resisted sothat the load which is added to the revolving doors at a predeterminedrate of speed may be accurately controlled. The friction wheel 53 has afriction face 58 secured thereto adapted to be pressed into gagementwith the friction face 59 of the casing 31 for retarding the rotation ofthe revolving doors and holding the doors to the predetermined speed inaccordance with the condition of centrifugal force which is establishedas the doors revolve. The sleeve 52 carried by the frame of the frictionwheel 53, has clutch teeth 52a directed downwardly for normally engagingclutch teeth 60 projecting upwardly from a hub 61 on rotatable disc 62]The rotatable disc 62 has a plurality of upstanding lugs 62a thereondisposed in diametrically opposite positions on the disc 62 and serve aspivots for bell cranks 63. The bell cranks each carry weights 64 on theextremities thereof, which weights are free to move in radial planesunder the action of centrifugal force. The bell cranks have pressurefeet 65 on opposite extremities thereof which engage the lower face ofth frame of the friction wheel 53. Under the action of centrifugal forcethe weights 64 move outwardly within the hollow interior of the housing31 and operate to force friction wheel 53 upwardly so that frictionsurface 58 engages beveled surface 59 in housing 31 for graduallyincreasing the load on shaft 45, and holding the shaft and associatedtrain and the revolving doors to the predetermined speed. The variousdegrees of loading on the revolving doors depend upon the amount ofcentrifugal force which is established. When the rate of movement isinterfered with, the flywheel 62 acts as a driver, thus causing clutch60 to raise clutch 52a. This action brings 58 in contact with 59 andwill stop the doors, serving j as a safety device, for in case of anyobject or person getting caught between the doors and wall the doors maybe quickly stopped thus avoiding injury to property and people. Thebrake acts very quickly where a person or object stops the door and willprevent accidents which could occur if the brake did not act promptly.When the speed the revolving door is reduced, the weight of the frictionwheel 53 and the force of spring 56 acting upon pin 54 is such as torestore the bell cranks to a position immediately adjacent the uppersurface of rotatabl disc 62, thus returning the weights 64 to a positionin which changes in speed will produce changesin angular position of theweights 64. The speed control may be adjusted for operation at selectedrates of speed by adjusting screw threaded member 5'? against spring 56which bears diametrically extending rod 54, so frictional load will berendered effective at a predetermined speed. The trolley mechanismoperating upon the guide rails permits the doors to be moved over to theside of opening, thereby giving a free opening so that large objects maybe taken through the doors. The trolley only carries the weight of thedoors. When the doors must be moved out of central position, the ejectorrod 66 is given a quick vertical movement by means of bile theprojecting lever 67 extending through slot 65 in the vertically disposedtube 2. The ejector rod 65 passes through a bushing, as indicated at 69,which is placed in the end of tube 2. Rod 66 a diameter of approximatelyand a length terminating short of the pin 18. Rod 66 always terminatesbeneath pin 18 allowing the installation of the equipment on doors ofdifferent heights and permitting installations to be made on old doorsnow in use. ward movement of rod 66 forces pin 18 out of socket l7,enabling gear 162) to be disengaged from gear 32, so that the entirerevolving door structure may be shifted on the trolley away from thespeed control mechanism.

When it is desired to engage the speed control mechanism with therevolving door structure, the revolving doors are moved on the trolleymechanism to a position in which the pin 18 rides on beveled surface 160of member 16 and after being depressed vertically drops into the socketformed by sleeve 17, thereby maintaining the gears in mesh and enablingthe speed control to directly function under control of the movement ofthe doors. In order to maintain the parts of the speed control inlubricating condition, I provide a port 69 through shaft 45 which may beclosed by any suitable oil cup or device, represented generally at 70,for supplying lubricant to the moving parts of the speed control.

It will be seen that under normal conditions the rotatable disc 62, theframe 53 of the friction wheel and the rotatable shaft 45, rotate as aunit through the clutch connection formed by teeth 52a and 60. Underconditions of increase in speed, however, the load due to the verticalmovement of the friction wheel of which 53 forms a part, is increased asthe coupling between rotatable disc 62 and shaft 45 is decreased but theclutch teeth 60 and 52a are never disengaged. The loading of the doorswill prevent racing through them. It is not intended for the speedcontrol to exert a force great enough to cause the doors to collapse,but to add a load so as to discourage the desire to race, thereby makingthe doors safe for everybody. The clutch is always engaged except whenthe door decelerates. When the door moves slower than the flywheel, theclutch partially disengages when the upper jaws raise.

It will be observed that rotatable disc 62 is weighted at its peripheryso that the flywheel acts as a regulator and continues to drive therevolving doors by release of the kinetic energy stored therein afterthe driving force on the doors has been released. Allowance is made inthe action of the brake system to permit sufficient movement of therevolving doors to prevent injury to persons or objects caught betweenthe ends of the door wings and the frame. The character of grippingaction brought about by the brake system is such, that a sufficientyielding action is obtainable to prevent injury to persons or objects.If the speed of rotation is increased beyond a safe value and the doorcomes to rest at the limit of the peak speed, the brake willautomatically allow the door to be released and to be revolved freely.

The structure of my invention has been found to be highly practical inmanufacture, production and operation, and while I have described myinvention in certain preferred embodiments, I desire that it beunderstood that modifications may be made and that no limitations uponmy invention are intended other than are imposed by the scope of theappended claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is as follows:

1. In a revolving door construction, an overhead track, a casing mountedin a stationary position adjacent said track, a vertical shaft carryingradial door-wings, said shaft being rotatably mounted and shiftablealong said track into and out of position adjacent the casing, and meansin the casing for controlling rotation of the shaft operativelyconnected with the shaft when the shaft is in a set position adjacentthe casing.

2. In a revolving door construction, an overhead track, a casing mountedin a stationary position above said track, a carriage slidable alongsaid track, a vertical shaft carrying radial door-wings and journaledthrough said carriage and movable therewith into and out of positionbeneath said casing, means in said casing for controlling rotation ofsaid shaft operatively connected with the shaft when the shaft is inposition beneath the casing, and means for releasably securing the shaftand carriage against movement out of position beneath the casing.

3. In a revolving door construction, an overhead track, a shaft carryingradial door-wings, said shaft being rotatably mounted and shiftablealong said track into and out of position to rotatably mount the door ina doorway and means for controlling the rotation of said shaft mountedin a stationary position adjacent said track and operatively connectedwith the shaft when the shaft is moved into the said position torotatably mount the door.

4. In a revolving door construction, an overhead track, a stationarycasing above said track, a carriage shiftable along said track, avertical shaft carrying radial door-wings and journaled through saidcarriage and movable therewith into and out of a set position beneaththe casing, a gear upon the upper end portion of said shaft, means insaid casing for controlling rotation of said shaft having actuatingmechanism including a gear meshing with the gear of said shaft when theshaft is in position beneath the casing, and means for releasablysecuring the shaft and carriage in place beneath the casing.

5. In a revolving door construction, an overhead track, a stationarycasing above said track,

a carriage shiftable along said track, a vertical shaft carrying radialdoor-wings and journaled through said carriage and movable therewithinto and out of a set position beneath the casing, a gear upon the upperend portion of said shaft, means in said casing for controlling rotationof said shaft having actuating means including a gear meshing with thegear of the shaft when the shaft is in position beneath the casing, thegear of the shaft having a concentrically located socket open at itsupper end, a latch pin slidably carried by said casing for verticalmovement into and out of a depressed position for engaging in saidsocket to releasably secure the shaft and carriage in place beneath thecasing with the gears meshing, and a spring yieldably holding the pin inits depressed position.

'I'HURLOE M. HAGENBOOK.

